Add Copy as Markdown button for easy email sharing

- New copyMarkdown() function generates clean Markdown with verdict, key dates table, and calculation table
- Uses clipboard API with textarea fallback for broad browser support
- Button shows brief "Copied!" confirmation feedback
- Green emerald button sits alongside existing Calendar and CSV exports

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

index.html

@@ -540,7 +540,11 @@
 
       <div class="flex flex-wrap justify-between gap-2 mt-4 no-print">
         <button onclick="goToStep(3)" class="px-6 py-2.5 bg-gray-200 dark:bg-gray-700 hover:bg-gray-300 dark:hover:bg-gray-600 rounded-lg font-medium text-sm transition-colors">&larr; Adjust Dates</button>
-        <div class="flex gap-2">
+        <div class="flex flex-wrap gap-2">
+          <button onclick="copyMarkdown()" id="btnCopyMd" class="px-5 py-2.5 bg-emerald-600 hover:bg-emerald-700 text-white rounded-lg font-medium text-sm transition-colors flex items-center gap-2">
+            <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 5H6a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2v-1M8 5a2 2 0 002 2h2a2 2 0 002-2M8 5a2 2 0 012-2h2a2 2 0 012 2m0 0h2a2 2 0 012 2v3m2 4H10m0 0l3-3m-3 3l3 3"/></svg>
+            Copy as Markdown
+          </button>
           <button onclick="exportICal()" class="px-5 py-2.5 bg-blue-600 hover:bg-blue-700 text-white rounded-lg font-medium text-sm transition-colors flex items-center gap-2">
             <svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 7V3m8 4V3m-9 8h10M5 21h14a2 2 0 002-2V7a2 2 0 00-2-2H5a2 2 0 00-2 2v12a2 2 0 002 2z"/></svg>
             Add to Calendar

script.js

@@ -748,6 +748,95 @@ function csvEscape(str) {
   return str;
 }
 
+// ---- Copy as Markdown ----
+function copyMarkdown() {
+  if (!lastCalculationData) return;
+  const data = lastCalculationData;
+  const briefType = document.getElementById('briefType').selectedOptions[0]?.text || '';
+  const lines = [];
+
+  // Header & summary
+  lines.push(`## SLA Summary — ${data.briefName || 'Untitled'}`);
+  lines.push('');
+  lines.push(`**Brief Type:** ${briefType}`);
+  lines.push(`**Kick-Off Date:** ${formatDateLong(data.kickOff)}`);
+  lines.push(`**Required Go-Live:** ${data.goLive ? formatDateLong(data.goLive) : 'Not set'}`);
+  lines.push(`**Planned End Date (SLA):** ${formatDateLong(data.projectEndDate)}`);
+  lines.push(`**Suggested Go-Live (SLA):** ${formatDateLong(data.suggestedGoLive)}`);
+
+  if (data.canMeet === null) {
+    lines.push('**Verdict:** N/A — No Go-Live date set');
+  } else if (data.canMeet) {
+    lines.push('**Verdict:** ✅ YES — Can meet the deadline');
+  } else {
+    const gap = businessDaysBetween(data.goLive, data.projectEndDate);
+    lines.push(`**Verdict:** ❌ NO — Cannot meet deadline (${gap} business days over)`);
+  }
+
+  // Key Dates table
+  lines.push('');
+  lines.push('### Key Dates');
+  lines.push('');
+  lines.push('| Stage | Active | Stage Kick-Off | WIP 1 To Approval | Receive Feedback By | Rounds | Stage Complete By |');
+  lines.push('|---|---|---|---|---|---|---|');
+  data.stages.forEach(s => {
+    const active = s.active ? '✅ Y' : '⬜ N';
+    const kickOff = s.active ? formatDate(s.kickOffDate) : 'n.a.';
+    const wip = s.active ? (s.noFeedback ? 'n/r' : formatDate(s.wipCompleteDate)) : 'n.a.';
+    const feedback = s.active ? (s.noFeedback ? 'n/r' : (s.feedbackByDate ? formatDate(s.feedbackByDate) : formatDate(s.wipCompleteDate))) : 'n.a.';
+    const rounds = s.active ? (s.noFeedback ? 'n/r' : s.rounds) : 'n.a.';
+    const complete = s.active ? formatDate(s.completeDate) : 'n.a.';
+    lines.push(`| ${s.label} | ${active} | ${kickOff} | ${wip} | ${feedback} | ${rounds} | ${complete} |`);
+  });
+
+  // Calculation of Days table
+  lines.push('');
+  lines.push('### Calculation of Days');
+  lines.push('');
+  lines.push('| Stage | Active | Handover | WIP 1 | Feedback | Revisions | Complete By |');
+  lines.push('|---|---|---|---|---|---|---|');
+  data.stages.forEach(s => {
+    const active = s.active ? '✅ Y' : '⬜ N';
+    const handover = s.active ? s.handover : 0;
+    const wip = s.active ? s.wip : 0;
+    const feedback = s.active ? (s.noFeedback ? 'n/r' : s.feedback) : 0;
+    const revisions = s.active ? (s.noFeedback ? 'n/r' : s.revisions) : 0;
+    const complete = formatDate(s.completeDate);
+    lines.push(`| ${s.label} | ${active} | ${handover} | ${wip} | ${feedback} | ${revisions} | ${complete} |`);
+  });
+
+  const markdown = lines.join('\n');
+
+  // Copy to clipboard with fallback
+  const showCopied = () => {
+    const btn = document.getElementById('btnCopyMd');
+    const originalHTML = btn.innerHTML;
+    btn.innerHTML = `<svg class="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 13l4 4L19 7"/></svg> Copied!`;
+    setTimeout(() => { btn.innerHTML = originalHTML; }, 2000);
+  };
+
+  if (navigator.clipboard && navigator.clipboard.writeText) {
+    navigator.clipboard.writeText(markdown).then(showCopied).catch(() => {
+      fallbackCopy(markdown);
+      showCopied();
+    });
+  } else {
+    fallbackCopy(markdown);
+    showCopied();
+  }
+}
+
+function fallbackCopy(text) {
+  const ta = document.createElement('textarea');
+  ta.value = text;
+  ta.style.position = 'fixed';
+  ta.style.left = '-9999px';
+  document.body.appendChild(ta);
+  ta.select();
+  document.execCommand('copy');
+  document.body.removeChild(ta);
+}
+
 // ---- iCal Export ----
 function exportICal() {
   if (!lastCalculationData) return;